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    • 1. 发明申请
    • Use of a Histone Deacetylase Gene OsHDT1 in Enhancing Rice Heterosis
    • 使用组蛋白脱乙酰酶基因OsHDT1来增强水稻杂种优势
    • US20120102593A1
    • 2012-04-26
    • US13266914
    • 2010-04-29
    • Daoxiu ZhouChen LiLimin Huang
    • Daoxiu ZhouChen LiLimin Huang
    • A01H5/00C12N5/10A01H1/06A01H5/10
    • C12N9/16C12N15/8261C12N15/8289Y02A40/146
    • A histone deacetylase gene OsHDT1 which enhances utilization of heterosis in rice is isolated and cloned, said gene consisting of: 1) the DNA sequence of positions 1-894 in SEQ ID NO:1 in the Sequence listing; or 2) a DNA sequence which encodes the same protein as that encoded by the DNA sequence of 1). The histone deacetylase gene OsHDT1 is associated with enhanced utilization of heterosis in rice. When the transgenic plants having no phenotype were crossed with “Zhenshan 97A”, the F1 overexpression hybrid plants have obviously earlier flowering period than F1 wild-type hybrid plants. Moreover, the RNAi inhibition hybrid plants have a decreased seed setting rate compared to the negative control hybrid plants, while the parent RNAi inhibition plants and negative control plants shows no evident difference in the trait of seed setting rate. Western blotting revealed that the gene is capable of deacetylating histone, mainly at H4K16 site. In addition, there exist significant differences in the level of histone modification among “Minghui 63”, “Zhenshan 97” and “Shanyou63”.
    • 分离并克隆提高水稻利用率的组蛋白脱乙酰酶基因OsHDT1,该基因由以下组成:1)序列表中SEQ ID NO:1中1-894位的DNA序列; 或2)编码与由1)的DNA序列编码的蛋白相同的蛋白质的DNA序列。 组蛋白脱乙酰酶基因OsHDT1与水稻中杂种优势的利用有关。 当没有表型的转基因植物与“珍山97A”杂交时,F1过表达杂交植物的开花期明显比F1野生型杂种植物早。 此外,与阴性对照杂交植物相比,RNAi抑制杂交植物的种子定形率降低,而亲本RNAi抑制植物和阴性对照植物在种子定形率的性状上没有显示出明显的差异。 蛋白质印迹显示该基因能够脱乙酰化组蛋白,主要在H4K16位点。 此外,“明辉63”,“贞山97”,“汕优63”组蛋白修饰水平存在显着差异。